Full data view for gene MLH1

MLH1 variants classified by the InSiGHT consortium: criteria used for classification are available here. We encourage submission of relevant unpublished information to assist in the classification of variants via LOVD or this template which can be emailed to the curator.

The variants shown are described using the NM_000249.3 transcript reference sequence.

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Please note that a short description of a certain column can be displayed when you move your mouse cursor over the column's header and hold it still. Below, a more detailed description is shown per column.

Effect: The variant's effect on the protein's function, in the format 'R/C' where R is the value reported by the source and C is the value concluded by the curator; '+' indicating the variant affects function, '+?' probably affects function, '+*' affects function, not associated with individual's disease phenotype, '#' affects function, not associated with any known disease phenotype, '-' does not affect function, '-?' probably does not affect function, '?' effect unknown, '.' effect not classified.

Allele: On which allele is the variant located? Does not necessarily imply inheritance! 'Paternal' (confirmed or inferred), 'Maternal' (confirmed or inferred), 'Parent #1' or #2 for compound heterozygosity without having screened the parents, 'Unknown' for heterozygosity without having screened the parents, 'Both' for homozygozity.

Classification method: The method used for the clinical classification of this variant.
All options:

ACMG

ACGS

EAHAD-CDFB

ENIGMA

InSiGHT

kConFab

other=Other

Clinical classification: Clinical classification of variant, preferably based on standardised criteria (e.g. ACMG), directed on the clinical consequences as published/submitted, indicated using an enriched system including inheritance: e.g. pathogenic, pathogenic (dominant), pathogenic (recessive), pathogenic (!), pathogenic (maternal), pathogenic (paternal). Standard inheritance is covered by dominant/recessive, sex-linked and imprinting by maternal/paternal. A '!' warns for exceptional circumstances to be explained in the 'Remarks' field (low penetrance, variants pathogenic in heterozygous state only, hypomorphic/hypermorphic variants, protective variants, etc.). Non-disease consequences (e.g. drug metabolism (pharmacogenetics), risk factor, blood group, tasting bitter) are indicated using additions to the benign classification; benign (dominant), benign (recessive), benign (!), etc. The value 'association' is used for variants associated with a phenotype and 'NA' for variants from in vitro/in silico records. NOTE: classification may differ from the opinion of the curator as given in a variant SUMMARY-record or the 'Functional effect concluded'). NOTE: pathogenic/likely pathogenic should go together with "variant (probably) affects function" In ClassFunctional.
All options:

Published as: listed only when different from "DNA change"; variant as reported originally (e.g. 521delT). Variants seen in animal models, tested in vitro, predicted from RNA analysis, etc. are described between brackets like c.(456C>G)

ISCN: description of the variant according to ISCN nomenclature

DB-ID: database ID of variant, grouping multiple observations of the same variant together, starting with the HGNC gene symbol, followed by an underscore (_) and a six digit number (e.g. DMD_012345). _000000 is used for variants where DNA was not analysed (change predicted from RNA analysis), variants seen in animal models or variants not seen in humans but functionally tested in vitro

Origin: Origin of variant/record: Germline = in all cells, De novo = in all cells, but not in either parent, Germline/De novo (untested) = in all cells, parents not tested (use only when De novo is likely, e.g. isolated/sporadic cases with dominant disease), Somatic = present in a subset of cells, but not in either parent, Uniparental disomy = from parental disomy (maternal or paternal), CLASSIFICATION record = submitter only sharing variant classification (note another report may share Individual data), SUMMARY record = master summary record from curator (may link to another database), In vitro (cloned) = data resulting from in vitro functional assays, animal model = data from animal model, Artefact = false positive variant call, DUPLICATE record = variant already described on another chromosome (e.g. unbalanced translocation, duplicating transposition, 2nd fusion transcript, etc.)
All options:

Germline

De novo

Germline/De novo (untested)

Somatic

Uniparental disomy

Uniparental disomy, maternal allele

Uniparental disomy, paternal allele

CLASSIFICATION record

SUMMARY record

In vitro (cloned)

In silico

animal model

Artefact

DUPLICATE record

Unknown

Not applicable

Segregation: Indicates whether the variant segregates with the phenotype (yes), does not segregate with the phenotype (no) or segregation is unknown (?)
All options:

ID_report: ID of the individual that can be publically shared, e.g. as listed in a publication

Reference: reference to publication describing the individual/family, possibly giving more phenotypic details than listed in this database entry, incl. link to PubMed or other source, e.g. "den Dunnen ASHG2003 P2346"

Remarks: remarks about the individual

Gender: gender individual
All options:

? = unknown

- = not applicable

F = female

M = male

rF = raised as female

rM = raised as male

Consanguinity: indicates whether the parents are related (consanguineous), not related (non-consanguineous) or whether consanguinity is not known (unknown)
All options:

? = unknown

- = not applicable

no = non-consanguineous parents

yes = consanguineous parents

Country: where (country) does the individual live/recently came from. Give additional details (population, specific sub-group) and when parents come from different countries in "Population". Belgium = individual lives in/recently came from Belgium, (France) = reported by laboratory in France, individual's country of origin not sure
All options:

Constitutional methylation of the MLH1 promoter; patient′s father was affected by kidney and liver cancer at the age of 60 years and the mother was affected with an endometrial cancer at the age of 65 years (Fig. 2D)

54-year-old female with a history of ovarian and colorectal malignancy was found to have an ACC; family history revealed her mother had died of ACC and her sister had previously been diagnosed with endometrial and colorectal cancers.